-32.77% is the change from 830 to 558
Calculation steps:
[( 558 - 830 ) ÷ 830] x 100 = -32.77%
Formula
Percentage change = [(558 - 830) / 830] x 100
Subtract the new number by the original number
558 - 830 = -272
-272 ÷ 830 = -0.327710843373494
-0.327710843373494 x 100 = -32.77%